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| Section | Weight | Objectives |
|---|---|---|
| Perform basic shell scripting | - Use conditional statements, loops, and script inputs | |
| Configure local storage | 15% | - Configure swap space - List, create, delete partitions and GPT/MBR layouts - Create and manage LVM physical volumes, volume groups, logical volumes |
| Operate running systems | 20% | - Maintain accurate system time with chrony - Boot systems into different targets; manage systemd units - Manage networking and network services - Schedule tasks using cron and at - Manage logging and journaling |
| Deploy, configure, and maintain systems | 15% | - Manage software packages with DNF/YUM - Configure firewalld firewall rules - Manage network interfaces and settings with NetworkManager/nmcli |
| Understand and use essential tools | 25% | - Access remote systems via SSH - Archive, compress, unpack files using tar, gzip, bzip2 - Access shell prompt and issue commands with correct syntax - Use grep and regular expressions - Use input-output redirection - Create/edit text files; manage files, directories, links, permissions |
| Create and configure file systems | 15% | - Maintain entries in /etc/fstab using UUID or labels - Manage access control lists (ACLs) - Create and mount XFS, ext4, VFAT file systems - Mount and manage network file systems (NFS, autofs) |
| Manage users and groups | 10% | - Configure SSH key-based authentication - Create, delete, modify users and groups - Manage password policies and sudo access |
| Manage security | 10% | - Restore file contexts and troubleshoot SELinux issues - Enforce SELinux modes, contexts, booleans, and port labeling |
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NEW QUESTION # 53
Configure a restrictive umask for user natasha so new files become 400 and directories become 500.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
echo "umask 0277" > > /home/natasha/.bash_profile
Detailed Explanation:
* A umask of 0277 removes group and other permissions entirely.
* New files: base 666 minus mask 277 gives 400.
* New directories: base 777 minus mask 277 gives 500.
* Putting it in .bash_profile applies it for that user's login shell.
NEW QUESTION # 54
What must be the first line of a plain text user-data configuration containing YAML configuration for cloud-init?
Answer: D
Explanation:
Explanation/Reference:
Reference https://cloudinit.readthedocs.io/en/latest/topics/examples.html
NEW QUESTION # 55
Configure NTP.
Configure NTP service, Synchronize the server time, NTP server: classroom.example.com
Answer:
Explanation:
Configure the client:
Yum -y install chrony
Vim /etc/chrony.conf
Add: server classroom.example.com iburst
Start: systemctl enable chronyd
systemctl restart chronyd
Validate: timedatectl status
NEW QUESTION # 56
The firewall must be open.
Answer:
Explanation:
see explanation below.
Explanation
/etc/init.d/iptables start
iptables -F
iptables -X
iptables -Z
/etc/init.d/iptables save
chkconfig iptables on
NEW QUESTION # 57
Add an additional swap partition of 754 MB to your system.
The swap partition should automatically mount when your system boots.
Do not remove or otherwise alter any existing swap partitions on your system.
Answer:
Explanation:
fdisk -l
fdisk -cu /dev/vda
p n
e or p select e
default (first): enter
default (last): enter n
default(first): enter
default(first): +754M t (1-5)
l: 82 p
w #reboot
#mkswap /dev/vda5
vim /etc/fstab
/dev/vda5 swap swap defaults 0 0
wq
mount -a
swapon -a
swapon -s
NEW QUESTION # 58
......
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